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- W. J. DAVIDSON.

4 PLOW. No. 307,920. Patented Nov. 11, 1884.

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NITED STATES WILLIAM J. DAVIDSON, OF BIG SPRING, VIRGINIA.

PLOW.

SPECIFICATION forming part of Letters Patent No. 307,920, dated November11, 1884.

Application filed February 20, 1884.

' T to whom it may concern; 7

Be it known that I, WM. J. DAVIDSON, a citizen of the United States, anda resident of Big Spring, in the county of Montgomery and State ofVirginia, have invented certain new and useful Improvements in Plows, ofwhich the following is a specification.

My invention relates to plows and cultivators, and has for its object tolessen the danger of breaking, better adapt the plow to hold its propercourse and facilitate its manipulation; and to these ends my inventionconsists in providing means whereby to permit the beam to rise or themold-board to yield when the latter is brought against a fixed object oris caused to penetrate soil of unusual hardnesss or density.

In the drawings, Figure 1 illustrates myinvention in connection with aplow. Fig. 2 shows the same in connection with a cultivator. Fig. 3 isan enlarged section of part of Fig. 2.

To the beam A is pivoted the usual handles, 0 O, and the standard B mayextend through the beam, as in Fig. 1, and terminate in a screw-bolt,I), having the usual nut, d, and washer c. Beneath the washer is aspring or a block or pad of rubber, felt, or other yielding material,which is compressed by turning the not upon the bolt. The mold-board andlandside are secured to the standard, and the lower ends of the handlesare secured at the rear of the mold-board, so as to brace the latter,the standard, plow blade and handles always in this case maintainingtheir relative position, but the beam being capable of rising, swingingon its pivot and compressing the spring D. If the plow meets with anyunusual obstruction, the plow-blade will be retarded or arrested, butthe beam will rise to a greater or less degree, thereby lessening theshock to the plow, horse, and driver, and preventing injury to the plow.This arrangement will also prevent the plow from jumping or rising fromhard ground. To still further reduce the shocks and facilitate therising of the beam, a pad or spring, U, is introduced between the beamand nut at the point where the beam is pivoted to the handles, therebypermitting a slight yielding of the connection atthis point.

In Fi 2 the invention is illustrated in con- (N0 model.)

nection with a plow-cultivator where the forked standard B'is pivotallysecured to the beam by a transverse bolt, a, so as to swing thereon, anda cross-bar, f, connecting the bars of the standard, bears on a block orplate, 9, between which and the beam is confined a block, D,-ot' rubberor other elastic material, which permits a slight play of the beam inrespect to the standard under circumstances before mentioned. The block9 is of a wedge shape, as shown in Fig. 8, so that by driving it in, therubber may be compressed, and is ribbed so as to catch upon the bar f,which thus holds it in place. A bracket or block, s, upon the beam atthe rear of the standard serves as a back bearing for the latter to takethe strain off the bolt or portion of the standard that extends throughthe beam and insure a free movement. Sidelipsorlugs, t, prevent lateralmotion of the standard, and a guard, to, on the beam prevents grass,850., from getting between the shoulder of the standard and under sideof the beam.

I claim l. A plow provided with a beam capable of a limited motion inrespect to the standard, and with ayielding or elastic substance orspring arranged above the beam, substantially as described.

2. The combination of the handles 0, beam pivoted to the handles,standard extending through the beam, and spring D, compressed betweenthe top of the beam and a bearing on the standard, substantially asdescribed.

3. The combination of the handles, beam pivoted thereto, standardconnected to permit the beam to move independently thereof, and springbetween the two and spring U at the pivot of the beam, substantially asdescribed.

4. The combination of the beam and standard connected to permitindependent movement, the front guard, back bearing, and side lips,substantially as described.

In testimony whereof I have signed my name to this specification inthepresence of two subscribing witnesses.

\VM. J. DAVIDSON.

Witnesses:

F. L. FREEMAN, WM. S. SAYERS.

